<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="./vue.js"></script>
</head>

<body>
    <div id="app">
        <button @click="$event.target.innerText=1111">点击 </button>

        <button @click="log(1)">打印数字</button>
        <!-- 使用prevent ,阻止默认行为,等同于preventdefault -->
        <a href="/sss" @click.prevent="">点击跳转</a>
    </div>
    <script>
        Vue.config.productionTip = false;
        const vm = new Vue({
            el: " #app",
            data() { return {}; },
            methods: {
                log(num) {
                    console.log(num);
                }
            },
        }); </script>
</body>

</html>